EP1028289B1 - Temperature regulating device for baking oven having multiple heating systems - Google Patents
Temperature regulating device for baking oven having multiple heating systems Download PDFInfo
- Publication number
- EP1028289B1 EP1028289B1 EP19990102675 EP99102675A EP1028289B1 EP 1028289 B1 EP1028289 B1 EP 1028289B1 EP 19990102675 EP19990102675 EP 19990102675 EP 99102675 A EP99102675 A EP 99102675A EP 1028289 B1 EP1028289 B1 EP 1028289B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- heating systems
- control
- temperature gradient
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/087—Arrangement or mounting of control or safety devices of electric circuits regulating heat
Definitions
- the invention relates to a temperature control device for ovens with several heating systems, for example for Top heat, bottom heat, recirculation mode, grill, with one Temperature sensor in the oven space for specifying the actual temperature value for an electronic controller for regulation the oven temperature to predefinable setpoints, the Controller different controller parameters depending of the heating system switched on and / or each activated combination of heating systems for Controller adjustment can be fed.
- Means for detecting the temperature gradient at the temperature sensor and to compare the detected temperature gradient with the various heating systems and / or Combinations of heating systems associated with saved Temperature gradients are provided that each saved Temperature gradient a controller parameter or a Set of controller parameters is assigned and that depending the assigned by comparison Temperature gradient of the controller with the corresponding one Controller parameters or set of controller parameters can be applied is.
- the temperature control device can in advantageously on the cost-intensive and prone to failure Control inputs of the controller waive, and also a corresponding assembly and connecting lines to Function selection switches can be omitted.
- the each switched on heating system or the respectively switched on Combination of controller parameters assigned to heating systems are automatically assigned internally to the control loop, so that no additional lines or external Switching operations would be required.
- the assignment of the suitable controller parameters are therefore only via Software when training the controller as a microcomputer. By recording the respective temperature gradient to select the controller parameter (s) assigned this selection is practically independent of one Function switch.
- the controller which is designed in particular as a microcomputer in an advantageous manner in addition to the detection of the temperature gradient and / or for comparison with the saved ones Temperature gradients and / or to assign the corresponding Controller parameters or set of controller parameters educated. Thus, despite being more comfortable and extensive Functions of the hardware effort minimized.
- Offsets and / or in particular are the controller parameters Gain factors and / or tables for controller settings provided, each depending on the control loop of the recorded temperature gradient.
- a storage arrangement For storing the temperature gradients and / or controller parameters a storage arrangement is preferably provided, for the in particular the already existing memory of the microcomputer used as a controller can be.
- the temperature gradients are expedient filed in a table.
- a flow chart to explain the mode of operation is in the only one Drawing shown and in the description below explained in more detail.
- Ovens for example ovens
- These heating systems act it is, for example, those for generating top heat and / or bottom heat, for circulating air or hot air operation, for a grill or the like.
- a temperature controller Used to set a desired oven temperature a temperature controller on the part of a single temperature sensor The actual temperature value is supplied in the oven compartment becomes.
- the temperature setpoint is over a corresponding Setting element, for example a rotary switch, fed to the temperature controller.
- a function selector switch or a single button or a single switch is switched on by a switch 10 the determination of the temperature gradient in one calculation step 11 performed. In principle, this is done by a time derivative of the signal from the temperature sensor.
- a comparison step 12 the detected Temperature gradient with different, in a table stored temperature gradients compared that typical of the various heating systems and different possible combinations of heating systems are. These typical temperature gradients are, for example stored in the memory of a microcomputer that as Regulator is used. This microcomputer can in addition to its controller function, there are also other functions take over how the detection of a heating system or due to a certain combination of heating systems the comparison of a detected temperature gradient with stored typical temperature gradients.
- controller parameters can, for example Offsets, amplification factors and other typical control specifications be used to influence and adjust the Controller behavior are required. In the simplest case it can only be a single controller parameter act.
- the controller parameter or parameters corresponding tables can also be stored in the memory of the Microprocessor.
- controller parameters selected in this way or only a single controller parameter are now in step 14 to adjust the controller behavior the temperature controller supplied so that the temperature in an optimal manner T can regulate in the oven space or cooking space.
- a controller parameter can only from a correction value or a correction factor or a correction function for the actual temperature value or the temperature setpoint.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electric Stoves And Ranges (AREA)
Description
Die Erfindung betrifft eine Temperatur-Regeleinrichtung für Backöfen mit mehreren Heizsystemen, beispielsweise für Oberhitze, Unterhitze, Umluftbetrieb, Grill, mit einem Temperatursensor im Backofenraum zur Vorgabe des Temperatur-Istwerts für einen elektronischen Regler zur Regelung der Backofentemperatur auf vorgebbare Sollwerte, wobei dem Regler unterschiedliche Reglerparameter in Abhängigkeit des jeweils eingeschalteten Heizsystems und/oder der jeweils eingeschalteten Kombination von Heizsystemen zur Regleranpassung zuführbar sind.The invention relates to a temperature control device for ovens with several heating systems, for example for Top heat, bottom heat, recirculation mode, grill, with one Temperature sensor in the oven space for specifying the actual temperature value for an electronic controller for regulation the oven temperature to predefinable setpoints, the Controller different controller parameters depending of the heating system switched on and / or each activated combination of heating systems for Controller adjustment can be fed.
Bei Backöfen mit mehreren Heizsystemen wird üblicherweise aus Kostengründen nur ein Regler mit nur einem Temperatursensor verwendet, und ein Umschalter dient zur Umschaltung zwischen den Heizelementen für die verschiedenen Heizsysteme. Da alle Heizsysteme unterschiedlich arbeiten, läßt sich in der Praxis keine praktikable Position für den Temperatursensor im Backofenraum bzw. Garraum finden, welche für alle Heizsysteme das gleich gute Ergebnis liefert. In bekannter Weise werden daher jedem Heizsystem spezielle Reglerparameter, wie Offset und Verstärkung oder Tabellen für Reglereinstellungen, zugeordnet, und mittels des Funktionswählschalters zur Einstellung des gewünschten Heizsystems werden dann diese Reglerparameter dem Regler über Steuereingänge mitgeteilt. Nachteilig an der bekannten Lösung ist die Vielzahl von kostenintensiven Steuereingängen und Steuerkabeln, die häufig Ursache von Störungen sind. Darüber hinaus ist auch die Montage, also die Verkabelung, aufwendig und teuer.In ovens with multiple heating systems is usually only one controller with only one temperature sensor for cost reasons used, and a switch is used for switching between the heating elements for the different heating systems. Since all heating systems work differently, cannot be a practical position for the Find the temperature sensor in the oven space or cooking space, which is the same good result for all heating systems supplies. In a known manner, therefore, every heating system special controller parameters such as offset and gain or Tables for controller settings, assigned, and using the function selector switch to set the desired one Heating system then these controller parameters are the controller communicated via control inputs. A disadvantage of the known The solution is the multitude of cost-intensive control inputs and control cables, which are often the cause of Are disorders. In addition, the assembly is also so the wiring, complex and expensive.
Eine Aufgabe der vorliegenden Erfindung besteht somit darin, eine einfachere und sicherere Lösung zur Vorgabe der den einzelnen Heizsystemen zugeordneten Reglerparameter zu schaffen.It is therefore an object of the present invention to a simpler and safer solution for specifying the controller parameters assigned to the individual heating systems create.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß Mittel zur Erfassung des Temperaturgradienten am Temperatursensor und zum Vergleich des erfaßten Temperaturgradienten mit den verschiedenen Heizsystemen und/oder Kombinationen von Heizsystemen zugeordneten gespeicherten Temperaturgradienten vorgesehen sind, daß jedem gespeicherten Temperaturgradienten ein Reglerparameter oder ein Satz von Reglerparametern zugeordnet ist und daß in Abhängigkeit des durch Vergleich ermittelten zugeordneten Temperaturgradienten der Regler mit dem entsprechenden Reglerparameter oder Satz von Reglerparametern beaufschlagbar ist.This object is achieved in that Means for detecting the temperature gradient at the temperature sensor and to compare the detected temperature gradient with the various heating systems and / or Combinations of heating systems associated with saved Temperature gradients are provided that each saved Temperature gradient a controller parameter or a Set of controller parameters is assigned and that depending the assigned by comparison Temperature gradient of the controller with the corresponding one Controller parameters or set of controller parameters can be applied is.
Die erfindungsgemäße Temperatur-Regeleinrichtung kann in vorteilhafter Weise auf die kostenintensiven und störungsanfälligen Steuereingänge des Reglers verzichten, und auch eine entsprechende Montage sowie Verbindungsleitungen zum Funktionswahlschalter können entfallen. Die dem jeweils eingeschalteten Heizsystem oder der jeweils eingeschalteten Kombination von Heizsystemen zugeordneten Reglerparameter werden vollautomatisch intern dem Regelkreis zugeordnet, so daß keinerlei zusätzliche Leitungen oder externe Schaltvorgänge erforderlich wären. Die Zuordnung der passenden Reglerparameter erfolgt somit ausschließlich per Software bei einer Ausbildung des Reglers als Mikrorechner. Durch die Erfassung des jeweiligen Temperaturgradienten zur Auswahl des oder der jeweiligen zugeordneten Reglerparameter ist diese Auswahl praktisch unabhängig von einem Funktionswahlschalter.The temperature control device according to the invention can in advantageously on the cost-intensive and prone to failure Control inputs of the controller waive, and also a corresponding assembly and connecting lines to Function selection switches can be omitted. The each switched on heating system or the respectively switched on Combination of controller parameters assigned to heating systems are automatically assigned internally to the control loop, so that no additional lines or external Switching operations would be required. The assignment of the suitable controller parameters are therefore only via Software when training the controller as a microcomputer. By recording the respective temperature gradient to select the controller parameter (s) assigned this selection is practically independent of one Function switch.
Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Temperatur-Regeleinrichtung möglich.By the measures listed in the subclaims are advantageous developments and improvements of specified in claim 1 temperature control device possible.
Der insbesondere als Mikrorechner ausgebildete Regler ist in vorteilhafter Weise zusätzlich zur Erfassung des Temperaturgradienten und/oder zum Vergleich mit den gespeicherten Temperaturgradienten und/oder zur Zuordnung des entsprechenden Reglerparameters oder Satzes von Reglerparametern ausgebildet. Somit wird trotz komfortabler und umfangreicher Funktionen der Hardware-Aufwand minimiert.The controller, which is designed in particular as a microcomputer in an advantageous manner in addition to the detection of the temperature gradient and / or for comparison with the saved ones Temperature gradients and / or to assign the corresponding Controller parameters or set of controller parameters educated. Thus, despite being more comfortable and extensive Functions of the hardware effort minimized.
Als Reglerparameter sind insbesondere Offsets und/oder Verstärkungsfaktoren und/oder Tabellen für Reglereinstellungen vorgesehen, die jeweils dem Regelkreis in Abhängigkeit des erfaßten Temperaturgradienten zugeordnet werden.Offsets and / or in particular are the controller parameters Gain factors and / or tables for controller settings provided, each depending on the control loop of the recorded temperature gradient.
Zur Speicherung der Temperaturgradienten und/oder Reglerparameter ist vorzugsweise eine Speicheranordnung vorgesehen, für die insbesondere der ohnehin vorhandene Speicher des als Regler dienenden Mikrorechners verwendet werden kann. Die Temperaturgradienten sind dabei zweckmäßigerweise in einer Tabelle abgelegt. Ein Flußdiagramm zur Erläuterung der Wirkungsweise ist in der einzigen Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.For storing the temperature gradients and / or controller parameters a storage arrangement is preferably provided, for the in particular the already existing memory of the microcomputer used as a controller can be. The temperature gradients are expedient filed in a table. A flow chart to explain the mode of operation is in the only one Drawing shown and in the description below explained in more detail.
In bekannter Weise sind Backöfen, beispielsweise Backöfen von Haushaltsherden, separate Backöfen und professionelle Backöfen, wie Industriebacköfen, mit mehreren Heizsystemen ausgestattet, wobei ein Funktionswahlschalter oder einzelne Bedienungstasten oder -schalter zum Einschalten der einzelnen Heizsysteme oder zum Einschalten von Kombinationen dieser Heizsysteme dienen. Bei diesen Heizsystemen handelt es sich beispielsweise um solche zur Erzeugung einer Oberhitze und/oder Unterhitze, für den Umluft- bzw. Heißluftbetrieb, für einen Grill oder dergleichen.Ovens, for example ovens, are known of domestic stoves, separate ovens and professional Ovens, such as industrial ovens, with multiple heating systems equipped, being a function selector switch or individual Control buttons or switches for switching on the individual Heating systems or to switch on combinations serve these heating systems. These heating systems act it is, for example, those for generating top heat and / or bottom heat, for circulating air or hot air operation, for a grill or the like.
Zur Einstellung einer gewünschten Backofentemperatur dient ein Temperaturregler, dem seitens eines einzigen Temperatursensors im Backofenraum der Temperatur-Istwert zugeführt wird. Der Temperatur-Sollwert wird über ein entsprechendes Einstellelement, beispielsweise einen Drehschalter, dem Temperaturregler zugeführt.Used to set a desired oven temperature a temperature controller on the part of a single temperature sensor The actual temperature value is supplied in the oven compartment becomes. The temperature setpoint is over a corresponding Setting element, for example a rotary switch, fed to the temperature controller.
In der Praxis läßt sich keine praktikable Position für den Temperaturfühler im Backofenraum finden, der für alle Heizsysteme und Kombinationen von Heizsystemen ein optimales Ergebnis für den Temperatur-Istwert liefert. Die Erfindung geht nun von der Tatsache aus, daß jedes Heizsystem und jede Kombination von Heizsystemen am Temperatursensor einen anderen Meßgradienten für den Temperatur-Istwert bewirkt. Bei Heißluft ist zum Beispiel die Temperaturänderung am Temperatursensor nach dem Ein- oder Ausschalten der Heizung viel schneller als bei Oberhitze. Dies wird dazu verwendet, das jeweils eingeschaltete Heizsystem oder die jeweils eingeschaltete Kombination von Heizsystemen über den Temperaturgradienten zu erkennen und dann dem Regler diejenigen Reglerparameter zuzuführen, die für das jeweilige Heizsystem benötigt werden bzw. optimal sind.In practice, there is no practical position for the Find temperature sensors in the oven room, for everyone Heating systems and combinations of heating systems an optimal Returns the result for the actual temperature value. The Invention is now based on the fact that every heating system and any combination of heating systems on the temperature sensor another measuring gradient for the actual temperature value causes. With hot air, for example, is the change in temperature on the temperature sensor after switching on or off heating much faster than with top heat. This is used to keep the heating system switched on or the combination of Detect heating systems via the temperature gradient and then feed those controller parameters to the controller that are required for the respective heating system or optimal are.
Nach dem Einschalten eines bestimmten Heizsystems oder
einer bestimmten Kombination von Heizsystemen mittels
eines Funktionswahlschalters oder einer Einzeltaste bzw.
eines Einzelschalters wird über eine Einschalterkennung 10
die Bestimmung des Temperaturgradienten in einem Berechnungsschritt
11 durchgeführt. Dies erfolgt prinzipiell
durch eine zeitliche Ableitung des Signals des Temperatursensors.
In einem Vergleichsschritt 12 wird nun der erfaßte
Temperaturgradient mit verschiedenen, in einer Tabelle
gespeicherten Temperaturgradienten verglichen, die
jeweils typisch für die verschiedenen Heizsysteme und die
verschiedenen möglichen Kombinationen von Heizsystemen
sind. Diese typischen Temperaturgradienten sind beispielsweise
im Speicher eines Mikrorechners abgelegt, der als
Regler eingesetzt wird. Dieser Mikrorechner kann somit
außer seiner Reglerfunktion auch noch weitere Funktionen
übernehmen, wie hier die Erkennung eines Heizsystems bzw.
einer bestimmten Kombination von Heizsystemen auf Grund
des Vergleichs eines erfaßten Temperaturgradienten mit
gespeicherten typischen Temperaturgradienten. After switching on a specific heating system or
a certain combination of heating systems
a function selector switch or a single button or
a single switch is switched on by a switch 10
the determination of the temperature gradient in one
Nachdem durch Zuordnung des erfaßten Temperaturgradienten mit einem der gespeicherten typischen Temperaturgradienten das jeweils wirksame Heizsystem oder die wirksame Kombination von Heizsystemen erkannt wurde, wird in einem Zuordnungsschritt 13 eine Tabelle mit Reglerparametern angewählt, die zur Regelung des gewählten Heizsystems oder der gewählten Kombination von Heizsystemen erforderlich und optimal ist. Solche Reglerparameter können beispielsweise Offsets, Verstärkungsfaktoren und andere typische Reglervorgaben sein, die zur Beeinflussung und Einstellung des Reglerverhaltens erforderlich sind. Im einfachsten Falle kann es sich hierbei auch nur um einen einzelnen Reglerparameter handeln. Der oder die Reglerparameter bzw. die entsprechenden Tabellen können ebenfalls im Speicher des Mikrorechners abgelegt sein.After by assigning the detected temperature gradient with one of the stored typical temperature gradients the effective heating system or combination was recognized by heating systems in a step of assignment 13 a table with controller parameters is selected, to control the selected heating system or selected combination of heating systems required and is optimal. Such controller parameters can, for example Offsets, amplification factors and other typical control specifications be used to influence and adjust the Controller behavior are required. In the simplest case it can only be a single controller parameter act. The controller parameter or parameters corresponding tables can also be stored in the memory of the Microprocessor.
Die auf diese Weise ausgewählten Reglerparameter oder auch
nur ein einzelner Reglerparameter werden nun im Schritt 14
zur Einstellung des Reglerverhaltens dem Temperaturregler
zugeführt, so daß dieser in optimaler Weise die Temperatur
T im Backofenraum bzw. Garraum regeln kann.The controller parameters selected in this way or
only a single controller parameter are now in
Im einfachsten Falle kann ein Reglerparameter auch lediglich aus einem Korrekturwert oder einem Korrekturfaktor oder einer Korrekturfunktion für den Temperatur-Istwert oder dem Temperatur-Sollwert bestehen.In the simplest case, a controller parameter can only from a correction value or a correction factor or a correction function for the actual temperature value or the temperature setpoint.
Claims (6)
- Thermostat device for ovens with a plurality of heating systems, for instance for top heat, bottom heat, air recirculation, grilling or the like, with a temperature sensor in the oven chamber for pre-setting the actual temperature value for an electronic control unit for the control of oven temperature to pre-settable desired values, whereby the control unit can be supplied for its adjustment with varying control parameters in dependence on the currently switched-on heating system and/or combination of heating systems, characterised in that means (11) for the detection of the temperature gradient at the temperature sensor and for comparing the detected temperature gradient to the stored temperature gradients assigned to the various heating systems and/or combinations of heating systems are provided, in that a control parameter or a set of control parameters is assigned to each stored temperature gradient, and in that the control unit can be subjected to the control parameter or set of control parameters corresponding to the temperature gradient determined by comparison.
- Thermostat device according to claim 1, characterised in that a microcomputer is provided as a control unit.
- Thermostat device according to claim 2, characterised in that the microcomputer is in addition designed for the detection of the temperature gradient and/or for comparison with the stored temperature gradient and/or for the assignment of the corresponding control parameter or set of control parameters.
- Thermostat device according to any of the preceding claims, characterised in that offsets and/or gains and/or tables for control adjustment are provided as control parameters.
- Thermostat device according to any of the preceding claims, characterised in that a memory arrangement, in particular the memory of a microcomputer, is provided for storing the temperature gradients and/or control parameters.
- Thermostat device according to any of the preceding claims, characterised in that the temperature gradients are stored in a table.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19990102675 EP1028289B1 (en) | 1999-02-12 | 1999-02-12 | Temperature regulating device for baking oven having multiple heating systems |
DE59902739T DE59902739D1 (en) | 1999-02-12 | 1999-02-12 | Temperature control device for ovens with multiple heating systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19990102675 EP1028289B1 (en) | 1999-02-12 | 1999-02-12 | Temperature regulating device for baking oven having multiple heating systems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1028289A1 EP1028289A1 (en) | 2000-08-16 |
EP1028289B1 true EP1028289B1 (en) | 2002-09-18 |
Family
ID=8237546
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990102675 Expired - Lifetime EP1028289B1 (en) | 1999-02-12 | 1999-02-12 | Temperature regulating device for baking oven having multiple heating systems |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1028289B1 (en) |
DE (1) | DE59902739D1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004081430A (en) * | 2002-08-26 | 2004-03-18 | Paloma Ind Ltd | Fryer |
DE102005017617A1 (en) * | 2005-04-15 | 2006-10-26 | Electrolux Home Products Corporation N.V. | Method for temperature control and temperature control unit of a furnace |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4465228A (en) * | 1981-09-09 | 1984-08-14 | Matsushita Electric Industrial Co., Ltd. | Cooker with heating control system |
JP2588294B2 (en) * | 1990-03-30 | 1997-03-05 | 株式会社東芝 | microwave |
DE4223654A1 (en) * | 1992-07-17 | 1994-01-20 | Bosch Siemens Hausgeraete | Control device for a lockable device |
JPH09245956A (en) * | 1996-03-07 | 1997-09-19 | Matsushita Electric Ind Co Ltd | Induction heating cooker |
-
1999
- 1999-02-12 DE DE59902739T patent/DE59902739D1/en not_active Expired - Lifetime
- 1999-02-12 EP EP19990102675 patent/EP1028289B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE59902739D1 (en) | 2002-10-24 |
EP1028289A1 (en) | 2000-08-16 |
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